Biology Taxonomy
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Created by:
emilydelalla on February 1, 2012
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25 terms
Terms | Definitions |
|---|---|
 taxonomy | discipline of classifying organisms and assigning each organism a universally accepted name |
| binomial nomenclature | classification system in which each speciesss is assigned a two part scientific name |
| genus | group of closely related species, first part of the scientific name in binomial nomenclature |
| taxon | group of organization in which organisms are classified |
| family | group of genera that share many characteristics |
| order | group of similar families |
| class | group of similiar orders |
| phylum | group of closely related classes |
| kingdom | largest taxonomic group consisting of closely related phylum |
| evolutionary classification | method of grouping organisms together according to their evolutionary history |
| derived character | ch. that appears in recent part of lineage, but not in its older membranes |
| cladogram | diagram that shows the evolutionary relationship among a group of organisms |
| molecular clock | model that uses DNA comparisons to estimate the length of time that two species have been evolving independently |
| meristematic tissue | plant tissue found only in the tips of shoots ans roots,responsible for the growth |
| cuticle | in plants,a thick waxy layer on exposed outer surface of cells that protects them against water loss and injury |
| adhesion | attraction between molecules of two different substances |
| capillary action | tendency of water to rise in a thin tube |
| radial symmetry | body plan in which body parts repeat around the center of the body |
| bilateral symmetry | body plan in which only a single imaginary line can divide the body into two equal parts |
| cephalization | concentration of sense organs and nerve cells at the front of an animals body |
| coelom | fluid filled body cavity lined with mesodern |
| chordate | member of phylum chordata, animal that has , for atleast some stages of its life, a dorsal, hollow nerve cord, a notochord, pharyngeal puches and a muscular tail |
| notochord | long supporting rod that runs through a chordates body just below the nerve cord |
| pharyngeal pouch | one of the pair of structures in the throat region of a chordate |
| vertebra | individual segments of the back bone, encloses and protects the back bone |
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